Top 20 Mitsubishi VS-50705 50" Rear Projection Television Questions & Answers

Below are two of the most common problems encountered with projection TV sets. Problem #1 - CONVERGENCE PROBLEMProjection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. This is a very common failure on Projection TV sets and a fairly simple DIY fix.Common Symptoms include....

• Screen looks 3D
• Colors don't line up
• One or more colors can't be adjusted when using the convergence menu.
• Screen is bowed or warped.
• TV shuts off after powering on - TV may also make a chirping noise.

Here are some photos of convergence problems.Here is a quick test....Using your original remote go-to the settings menu then goto the convergence section.Try to adjust the red and then the blue convergence.You should be able to move RED and BLUE in all directions - up, down, left, and right.If you can't move them in all directions or cant move them far enough your convergence chips are bad and should be replaced. This is a common problem. Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a solutionCONVERGENCE SOLUTIONYou will need to replace the convergence chips and possibly some convergence resistors and pico fuses. This is a a fairly easy DIY job if you know what you are doing. If you have never done this before we would advise calling a shop or if you want to do it yourself get a complete kit with instructions and support from TvRepairKits.comTheir kits include a step by step instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, email/phone support, etc. Problem #2 CRT Fluid is CloudyProjection tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around video. Pic of a set that needs the fluid changed. Notice how dull the colors are and how white the screen looks. The screen may also look red, orange, dull, etc. BEFORESet after fluid change. Notice how bright the colors are now. Everthing looks crisp and sharp again. AFTERSolution #2 - CRT FLUID FIXWhat you will need to do is replace the coolant and clean the crt. You can get a repair kit from TvRepairKits.com . It includes replacement coolant,step by step instructions, support, etc.

Sounds like a convergence problem see if attached photos look like it:If need help let me know.

You should be able to find the replacement mitsubishi power cord from www.tvrepairworld.com

Hi Ron,
To determine where the fault came from, you may activate the "self diagnostic" mode of the unit. Once the unit is in self diagnostic, the led light will flash indicating the error code(first digit) then pause and will flash again(second digit error code). Count how many blinks does the unit have for first digit and second digit. Flashing of the led light error code will repeat 5 times.
Here's how to activate the "self diagnostic mode".
Press and hold the front panel buttons (not in the remote) "Input" and "Menu" at the same time for 5 second.
Let me know how many blinks it has to pinpoint what is the caused of the symptoms.
Jdvillanueva

the plug is gone or its a fusle

Tv have a problems known as a convergence problems,it dead.Tv have colors lines R,G,B mis alignments,have colors shadows pictures or 3D pictures look alike?The tv convergence board is dead.The tv convergence board require replacing 2 STK convergence ICS and some or all of it resistors too.To fixed the tv convergence board to solved the tv convergence picture problems.The shop,will cost u like $300-350 for parts and labors.

Hi con,
Welcome to FixYa.
My name is John.
I will be assisting you with your issue.
Go to SET-UP in the MENU.
Then do a CHANNEL SCAN or AUTO PROGRAM SCAN.
You should be good to go..
Thanks for choosing FixYa.
John

Fixing this problem involves opening the TV but keep in mind the voltages inside Rear Projection TV's are deadly even when unplugged. If you have experience, and test equipment I can walk you through troubleshooting at the link below, contact me there......
Here are some of the possible faults with VS-50 series:
Bad solder joints on the yoke of either RGB tubes
C2P05 C2C52 are probably in bad shape
STK392-040 and its resistors may need replacing
_________________________
if this helps please rate :-)
http://tvtechwork.webs.com/

power board malfunctioning

replace both of your STK392-570s big black ICs
call Mats they have them

I hope it could help.

There are no bulbs in this set. Only 3 crts red,blue and green. crts are probably going out. repair expense will exceed value due to age.

Bill;

Cause 1
1. VERTICAL ROLLING, VERTICAL BLANKING BAR LOCKING IN THE MIDDLE OF THE PICTURE, ALSO MAY HAVE HORIZONTAL PULLING OR TEARING. CHECK C2C52 10 UFD @ 50 V OFF THE BASE OF Q2C51 ON THE SIGNAL PCB.

2. CHECK C2P05 100 UFD 16 V OFF PIN 3 OF IC2P01 AND IC2P01 PART # 270P466020 (9-VOLT REGULATOR). BOTH ARE ON THE SIGNAL PCB.
Replace all these if they look bad or not. If you can't do it yourself call a service Company and get an estimate, it should cost about $450 if they know what they are doing.
Thanks using FixYa, Big Irish.

Codes 029-055-056-065-066-067-068-069-070-071-072-073-074-106-113-123

OK BUDDY IM NOT A HOE FIRST OF ALL AND SECOND LERN TO SPEEK GOOF

set tv on fire,then threw it down the stairs...
now,why would i tell you how i fixed it for 'free' ,when you
charge ''me'' for answers..hmm

Ok this problem is coming from either your tv sets vertical circuit or the tuner itself is faulty, most likely the problem is coming from your vertical circuit with bad solder on the vertical ic or you have a faulty capacitor which can also cause this problem what i would suggest unless you have electronic experience on troubleshooting electronic components is to take it to near by tv repair shop and have then troubleshoot this circuit to see which component is giving you this problem, thank you,hope this helps.

You need to remove front screen of TV to clean the mirror or anything inside.
Check below exploded view of VS-50705 manual to have an idea...

Not sure why you want to remove the protective screen but to do this you have to remove the entire screen with frame and all 3 screens from the set. remove speaker grill(s) on front of set; you will find if the front control board is in the frame of the screen you will have to locate one or two plugs to disconnect the keyboard--the wires usually go down in past an inspection plate and can be unplugged(they are marked with letters and if two, they will be different so you cannot get them in the wrong way).

With the keyboard unplugged you will find several black philips screws on the bottom edge of the screen frame(left to right under it). Remove these and with help lift the screen unit(frame and screens) up about 4 inchs(it hooks inside on notched holders) It will then come out.

Now the hard part---most of these sets you have to remove both inner screens and even take the screen frame apart to get at the front screen---any finger prints on the screen may show in the picture.. The protective Screen is in a slot all the way around--I have seen a few who tried to pry it out from the front and either damaged the frame or the screens.

Again, I am not sure why you want to remove the outer protective screen---but just be careful if you do---those inner screens are very expensive if you have to replace them.

If this has been helpful at all--give me a vote here---I do this for free.

If you have questions or need help:

[email protected]

Feel fortunate for the 10 years; owners of sets failing just after the warranty are really angry.
That length of time tells me that the power supply was better designed than most but is now failing to turn on and run. Modern supplies are very complex and demand a high level of component quality, far more so than the older (and less efficient) type called 'linear.'
The supply assembly is almsot always on a separate board and you should be able to recognize it through the relationship to the AC power coming in and the fact that they will have physically larger components, some cylindrical (capacitors) and others block-like devices (chokes and transformers.)
Look for an assembly number on that unit and contact Mitsubishi service to inquire about the replacement and/or repair cost of that board.
You really have been lucky since most modern sets don't run half that time without failing.